- JetStream performance upgrades: improved ack processing, faster ingest with many consumers, and StreamDetail now reports creation time on /healthz.
- Extensive bug fixes: resolve high CPU/memory on consumer deletion, enforce HA asset limits, honor account stream/consumer caps, fix subscription leaks, concurrency panics, TLS routing failures, and WorkQueue overlapping consumer issues.
- Minor enhancements include reduced warning logs, support for any ack type to suppress consumer auto‑cleanup, filtered mirror consumer creation, and corrected header key handling.
Release v2.9.7
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Added Leafnodes support with a configurable dial timeout option for high‑latency links
Upgrade to Go 1.25.12 and bump critical dependencies (klauspost/compress v1.19.2, golang.org/x/crypto v0.55.0).
Decoupled Raft transport and increased disk concurrency (now configurable) with several JetStream performance and memory optimizations;